It is common practice to store all your snacks in the pantry. However, this is not the recommended storage method for trail mixes, nuts, and dried fruits.
Store trail mix and nuts in your fridge or freezer to keep them fresh. Otherwise, they will go stale. Nuts are more likely to spoil at room temperature due to light, air, and varying temperature.
Storing your mixed nuts in the fridge or freezer will limit this exposure and keep them fresh for a prolonged time.
To properly store your trail mix, keep it in an air-tight container, like glass jars. This practice helps to lock out the moisture, foreign smells, and taste of other foods from seeping into the trail mix.
Storage in the freezer is your best option if you want to keep them for a more extended period.
But if you prefer to keep your snack mix at room temperature, you should adequately seal them and store them in a cool, dry place.
If stored correctly, keeping them in a calm and dark spot will allow the nuts to remain fresh for up to 3 months.